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Sodium triphosphate (STP), also sodium tripolyphosphate (STPP), or tripolyphosphate (TPP) is an inorganic compound with formula Na5P3O10.
S 4479 (OTTO) Sodium triphosphate, anhydrous Cas 7758-29-4 - used for the determination of BSB The majority of STPP is consumed as a component of commercial detergents.